Carl gustaf otto hjalmar von kohlek



No. 772,522. PATENTED OCT. 18, 1904. G. G. 0. H. VON KUHLER. TIME ALARM FOR ELEGTRIG LOGS.

APPLICATION FILED JUNE 23, 1903.

N0 MODEL.

V/r/vsss 56 UNITED. STATES Patented October 18, 1904.

PATENT OFFICE.

TIME-ALARM FOR ELECTRIC LOGS.

SPECIFICATION formingpart of Letters Patent No. 7 72,522, dated. October 18, 1904.

Application filed June 23, 1903. Serial No. 162,808) (No model.)

To on whom it may concern.-

Be it known that I, CARL GUsTAF O'r'ro HJAL- MAR VON KoHLER, engineer, a resident of 16 Sturegatan, Stockholm, in the Kingdom of Sweden, do hereby declare the nature of my invention for Improvements in Time-Alarms for Electric Logs, and in what manner the same is to be performed, to be particularly described and ascertained in and by the'following statement. e

Electric-log recordingapparatus in which an electric current is closed by the log for each passed unit of the distance, hereby turning a lever that produces a'mark in a paper strip continuously brought into motion by a clockwork, are already known. Such apparatus have the inconvenience that they cannot indicate if the motion of the log has been stopped under a longer or shorter time for any reason for instance, on account of sea-grass having snared itself round the same. In such case the distance between the marks in the paper strip will be longer, so that the observer believes that the velocity of the vessel has been less than in the reality. In other words, the recording apparatus indicates wrong.

The presentinvention relates to an improvement in such log-recording apparatus, by means of which improvement in the above case a signal is given indicating that the log is not working normally.

In the accompanying drawings a part of my improved time-alarm for electric-log recording apparatus is illustrated in side view in Figure 1. Fig. .2 illustrates a part of it in perspective view.

a is the electromagnet, and Z; the lever operated by the same and connected to a shaft n, also carrying another lever, t, for producing the marks in the paper strip 9. The lever 22 is provided with a pawl c, at the motion of the lever turning a ratchet-wheel (Z, which may be connected to a hand g, movable over a graduated plate r, provided with electric contacts. When the hand passes over these contacts, an electric current is closed and a signal is produced.

According to the present invention there is near the outer end of the double lever b placed a gear-Wheel a, rotated by a clockwork and meshing with a rack j, which is movable lengthwise in a guide 9, but also oscillates vertically if operated upon by a lever it, which is pivoted on a stud and is located with one end between the rack and the rear end of the lever 6. The rack f is connected to a spring 2',

forcing it backward, while the gear-wheel e by turning the lever it, which in turn raises the fore end of the rack f from the gear-wheel e, whereupon the rack is drawn back. by the spring When the current passing the electromagnet is again broken and the electromagnet lets the lever b loose, the rear end of the latter sinks down again into'the position shown in the drawings, the rack f being then again caused to mesh with the gear-wheel and to be pushed forward by it until the lever Z) is turned again by the log and the rack is pushed backward by the spring 11. If now the rotation of thelog would cease, so that no current were closed in the electromagnet, the fore end of the lever 12 becomes not lowered. In consequence the lever b is not turned and the rack not raised out of its meshing with the gear wheel 6, but becomes successively pushed forward by the said wheel until the rack meets an electric contact I located in its way, thereby closing a current to an electric signal device s and producing a signal indicating that the apparatus is not in order. Instead of the electric contact. in a mechanical alarm apparatus may be employed.

The way that the rack ought to be pushed by the gear-wheel for the purpose of meeting the contact in may be made longer or shorter by placing behind the rear end of the rack a plate or the like Z, that may be adjusted more or less far from the gear-wheel a For this purpose the plate. for instance, may be curved and connected to a lever m, pivoting on the shaft of the gear-wheel 6, so that the situation of the plate may be changed by turning the lever and the backward stroke of the rack limited, thus permitting changes in the length of the wayof the rack to the contact in. This is very advantageous if it is desired to obtain a signal when the vessel has not the velocity wished for. In such a case the platel is ad justed so that the length of the way which the rack f is already moved by the gear-wheel 6 before it is pushed back through the closing of the electric current will be less than the" distance between the stop-plate land the contact it. If the velocity of the vessel grows less, the rack is pushed forward againstthe contact, and a signal is given before the log.

" be employed even in other apparatus working in the same manner as the log-recording apparatus.

Having now particularly described andnascertained the nature'of my said invention a-nd in what manner'the same is to'be performed, I declare that what I claim.is a

1. Ina time-alarmfor electric logs-and the like, the combination of a gear-whe'el; a" clockwork for rotating same, aslidingrack Ineshing with the wheel and arranged to operate an alarm when moved a given-distance by the wheel, a spring returning the rack to normal positioman oscillating lever under the rack, an-electromagnet adapted tooscillate the said lever and arranged in a circuit intermittently closed bythe movable part of the apparatus,

a pivoted lever, the one end of which is 10- catedibetween-the rack and the end of the oscillatinglever and an adjustable stop for the backward movement of the rack, substan- 1 tially as describe'dt 2. In a time-alarm for electric logs and the like,ithe combination of agear-wheel, a clockwork for rotating same, a sliding rack meshingwiththe w-heel and arranged to operate 'an alarm when moved a given distance by the Wheel, a spring returning the rack tonormalposition, an oscillating lever under the rack,- an electromagnr2t adapted: to oscillate the said lever and-arranged in a: circuit intermittently closed by the movable part of' the apparatus,.

a pivoted-i lever, the one endv of which is 10- cated between the rack andthe end of the oscillating lever and a stop on a lever pivoting on the shaft of thegear-wheeh substantially as described.

Inwitness whereof I have hereunto set my handin presence of two witnesses.

CARL GUSTKF OTTO HJALMAR VON KilHLER.

Witnesses:

JOHN- EDBERG, H: TELANDER; 

